Using 100% acetone and other nail polish removers may cause the head to look cloudy.

Whenever you find it could not pick up the patterns well, pls wash the stamper by running water (regular temperature is fine) and dry it in air;Or please follow the instructions below to prime the stampers before using:1. use nail files to file the stamper head, but please note : you need to file it very very slightly;2. use cotton ball or pad to wipe the stamper head;3. use cotton ball or pads to apply a little alcohol and then use it to wipe the stamper head.